| 摘要 |
<p>A signal receiver (300) has a tuner (301), which receives an RF_IN signal and outputs a desired IF_OUT intermediate frequency signal to a demodulator (311). The demodulator (311) sends to the processor (321) a digital stream of a desired signal TS. The processor is connected to the tuner (301) and the demodulator (311) via control signal lines S1 and S2, through which it transmits various commands, for example, setting a specific AGC characteristic or tuning to a specific frequency. The processor (321) comprises a tuner controller (322), which comprises an input filter identifier (323), which identifies the passband of the input filter for a desired signal. The processor (321) has also a desired signal level detector (325), a detector (326) of the strongest signal level in a given band on the basis of the tuner gain and a controller (327) of AGC characteristic on the basis of the strongest signal level and the desired signal level.</p> |
